Apparatus for making concrete pipe



Feb. 23 ,1926.- 1,574,421

C. H. BULLEN APPARATUS FORMAKING CONCRETE PIPE VFiled Jne l, 1923 lll lPatented ses. z3, 192e.,

` v15741.421 UITE srtle retirent OFFICE-l" i CLARE H. BULLEN, OFPRTLAND, VREGON, .ASSGNORKTO 'JJUERCK `MAGKENZIE -MA CHINE C0., OFPORTLAND, OREGGN, A CRPURATON 0F lGREG-ON.

Arran-Arcs non Manilva ccivcnnrn Iren. i

Application filed June 1, 1923. Serial No; 642,728.

To all whom @'15 may concern.'

` Be it known that l, CLARE H. BULLEN, a citizen of the ,United States,and a resident ofthe city of Fortland, in the county of hllnltnoinah.and State of Oregon.) have invented certain new and useful lmprovementsin Apparatus for Making Concrete Pipe, of which thefollowing is aspecification.

This invention relates to improvements in concrete pipe 'makingmachines.

The obj-ect of the present invention is the provisionof .a machine of.the class described including` a revolving table upon which theconcrete pipe is molded havingq improved and simple means for securing.a mold thereto that may be quickly and readily .adjusted tokaccommodate the various sia-es of molds when a change of molds is made.

A `further object of the invention is the provision of means to supporta' concrete pipe mold in spaced relation above a table with which themold is revolved, the palette elementof the mold being provided withsupporting; legs so that accidental obstructions on .the table will notaffect the vertical alignment of the mold'and when removed therefrom thegreen pipe will be maintained duringv the setting period upon a levelsupport.

A still further object of the invention is the provision of devices forpreventing the lode-ement. of cement material in the openingsnecessarily provided in the revolving table and accessories thereof.

A still further object of the invention is .to provide means tocompensate for any wear or distortion of the mold-base through continueduse .or accidental damage whereby the mold walls may be alignedvertically and maintained concentric withthe cent-ral core to ensurethat the pipe walls will be symmetrical and of even thickness.

lith the above and other objects in view, which will appear in thecourse of the succeeding specification, the invention consists in thenovel construction of a concrete pipe making machine table, the mold andpalette therefor, and the combination and adaptation therewith of novelmeansand devices for acoomplishing` the objects and advantages above setforth', and hereinafter eX- plained, as will be fully described in thefollowing specification, illustrated in the .in section, of the forwardItable to an `en-d wall 2l in accompanying drawings, and finally pointedout 1n the appended claims.

ln the accompanying drawings: Figure l is a view inside elevation,partly part of a pipe-l forming machine illustrating my invention. Fig.2 is a plan view of the revolt/.able mold-carrying` table andinoldthereon.

Figi. 3 through the line 3 3 ofllig. 2.

Fig. 4; is of a detail of said table-.and mold securing' devices.

Fig. 5 is a view in section on lirico-5 of Fig. 4.

, Fig.V 6 is an underside `rperspective View of a palette element of theinvention."

Referring to said views, in which similar characters of referenceindicate like parts in several views, the reference numeral l0 in'- vdicates .a base serving .as 4a support for the entire pipe-makingmachine of vwhich the .framevstandard ll thereof issh-own.v Rigrdlymounted upon one end of said base is a kcircular pedestal l2 upon whicha circular Vtable 13 is supported concentrically to ro-y tate in ahorizontal plane. fA circularbeveltoothed rack l5 is formed or pro-videdupon a fragmentary top plan vii-ew- Yso is an enlarged y sectional Vviewf the underside of ,said table with which a pinion lo keyed upon the endof a drive shaft 17 operatively engages to rotate sai-d table in thedirection indicated bythe arrow in Fig?. 2.

` Said table has a plane upper surface 18 and is formed with aplurality7 preferably four, of inverted T-sh-aped slots "20 extendingradially from the outer periphery of the proximity tothe axis .of saidtable.

A bar 22 is arranged to engage in each said slot and is formed offT-configuration in cross-section with its lateral walls in closesliding lit with the corresponding walls of the slot while its upperface23 is depressed below the plane of said table and a clearance isprovided at 25 between its underside and the bottom of said slot.Eachsaid bar is formed' with a plurality tapped holes 26 extendingvertically therethrough and each said hole is provided with .ascrew-threaded plug 27 to close the upper ends thereof against entranceof ceinent or other foreign matter.

of equally spaced l A block7 indicated'generally by the nudirt or cementmaterial spilling on the table may accumulate without adverselyaffecting the .set or operative position of the mold as mightotherwisebe the 'case if the mold sat directly upon the table.

Furthermore, as the palette is left under the pipe when the latter isremoved to the curing room to set it acts as a support and protectiontherefor and due to its triple legs it will always rest evenly on thefloor and support the pipe in erect position regardless of accidentalunevennesses therein. Ow ing to the elevation ont the palette upon thelegs 52 the mold n ay be more readily removed and with less danger ofinjury to the pipe. The clamps holding the pipe mold sections togetherare loosened and the mold will then drop vertically tothe floor theslight distance the mold-base is elevated above the floor by said legs52 and thereby break the .suction between the mold wall and the wet pipewhereupon the mold sections V may be taken away without danger to thepipe. Y

Having described my invention, what I claim is l l. In a machine of theclass described, a rotatable table having a plurality of radiallydirected slots therein, a bar slidably mounted in each said slotprovided with a plurality of tapped holes spaced along its length, and amold-supporting block provided with means 'co-operating with lsaidbar-holes for clamping said block to the table.

2. ln a machine of the class described, a rotatable table having a.plurality of radially directed slots therein, a bar slidably` mounted ineach said slot provided witha plurality of tapped holesrspaced along itslength, a mold-supporting block, means tosecure said blo'clr to saidbar, and a screwthreaded plug for closing each of said holes.

3. In a machine of the class described, a rotatable table formed with aplurality of radially directed slots, a bar slidably re.- tained in eachsaid slot, and a mold-supporting block detachably conne'ctedat spacedintervals to each said bar. v

al.. In a machine'of the class described, a rotatable table formed witha radially directed slot, a bar slidably retained in said slot, amold-supporting block, and means connecting said bar and said blockwhereby said block may be detachably clamped to the table.

5. The construction such as disclosedk where the mold supporting blockandk the aar are detachably 'coupled together and are freely slidablelongitudinally of the table slot until tightened into place.

6. In a machine of the class described, a i

7. In ai machine ofthe class described, a

rotatable table formed with a plurality of radially directed invertedT-shaped slots, a T -shaped bar slidably retained in each said slot, anda mold-supporting block detachably connected at spaced intervals to eachsaid bar. l Y

8. In a machine of the class described, the combination with a rotatabletable Jformed with a pluralitypof radially directed slots in itsupper'face, of a block having a rib soA on its underside interlitting ineach said slot, Y

said blocks each having a mold-supporting shoulder and an upstandingportion at its outer edge, said upstanding portion being formed with alaterally directed lip, a. mold formed with .a lower flange supported onsaid shoulders andttormed with a lug engageable by said lip, andslida-ble means in said slot to secure said block in adjusted radialpositions. y i 9. In a machine of the class described, the combinationwith a rotatable table, a

ing a laterally eXtencli1ig-base-llange, of a lplurality ofmold-supporting blocks adjust- 'ably secured on xsaid table, and a moldhavplurality of screws adapted to protrudeY through said flange and tobear upon said blocks, respectively.

' 10. In a machine of the class described, a rotatable table having aplurality of radially directed Vslots therein, a bar slidably mounted ineach said slot each providedV with a plurality length, a supportingblock, means to secure said bloclr to said bar by means of said holes,and a plurality of plugs for closing the holes not used.

Signed at Portland, Oregon, this 15 day of May, 1923.

CLARE n. BULLEN.

ofholes spaced along its

